Compared to the KC06A:
The AG-R8 is not as easy to drive as the KC06A but still easy to drive. More sub and mid bass compared to the KC06A but the bass isn't as detailed. Mids are very comparable but the KC06A just sounds a little more airy. Noticeable in female vocals. The KC06A unfortunately completely slays the AG-R8 when it comes to highs. You can hear a lot more micro details in the KC06A compared to the AG-R8, giving the former more sparkle and making it seem brighter. However, when listening to the KC06A after hearing the AG-R8, the KC06A does seem a little hot and sizzly. Considering though that the KC06A is double the price and perhaps my favourite IEM under $100, the AG-R8 performs decently.